When the sixth seal was opened John saw a great earthquake; and the sun became black as sackcloth, the full moon became like blood, and the stars of the sky fell to the earth
1 But understand this, that in the last days there will come times of difficulty.
Revelation 6
12 When he opened the sixth seal, I looked, and behold, there was a great earthquake, and the sun became black as sackcloth, the full moon became like blood,13 and the stars of the sky fell to the earth as the fig tree sheds its winter fruit when shaken by a gale.